Winthrop realized that with men here to whom math was sustenance, the sought-after answers might well be attained more quickly if he did not try to help further. As he went out, his gaze swept Rabin. The man's face was still drawn and pale in silent, fascinated study of the picture book. The ship again. In the bright sunlight Winthrop asked questions while study of the stern went on apace. The bow retained its mystery. The many electronic listening devices attached forward had not recorded one decibel of sound. In his mind the thought raced again: _Was there something lurking in the bow--something the little girl and Rabin had sensed--some unspeakable horror from the stars?_ He sought the general. "Bert, what about the bulkhead door?" he asked. "Are we going to open it?" "Not immediately," General Hill replied. "The occupants will, if alive, probably come out in their own way and time. If we try to break in prematurely we may bring on their deaths." His face grew somber. "It's a problem. The ship drifted down as if with a dead man's hand at the helm. It didn't come at that speed from origin. Someone or something cut its speed when it hit our atmosphere. Had it come in fast the hull would have heated, and the occupants would have been roasted alive. "Let's not force the issue. If alive they'll come out eventually. Meanwhile we're learning." _But can we wait?_ Winthrop thought. _Are we sensible in waiting?_ IV Night. Benton Allan beckoned Winthrop to his side. "You're familiar with Einstein's math, George. What do you think of this?" Winthrop studied the recorded results with mounting trepidation. "Similar processes. The end result will probably be E equals MC^{2}!" "Which explains the reactor and the fission bomb. We've cracked their math, George!" Lizio came in at a half-run then, his eyes excited, proud with discovery. "Gentlemen," he said quickly, "we could duplicate everything electronic if the ship soared away this minute! I guess we all thought we'd come across a product of a vastly more intelligent race. But their science is not superior to ours except in application. It found anti-gravity, for one thing!" He nodded, then went on quickly. "Something, however, puzzles us. There's either a draftsman's error, or a technician's error. One circuit leading forward should be connected to a junction box on the main power dynamo. Instead, it's connected to one of the gyro assemblies. Its function was undoubtedly intended to transmit a pulse to activate some mechanism forward, probably to arouse the crew. It probably acted on the anti-gravity apparatus instead, slowing the ship practically to a standstill and letting it drift in with the crew unawakened.